/Engine/Source/Editor/UnrealEd/Public/EditorLevelUtils.h
Sets the LevelStreamingClass for the specified Level
The new streaming level object
static [ULevelStreaming](API\Runtime\Engine\Engine\ULevelStreaming) * SetStreamingClassForLevel ( [ULevelStreaming](API\Runtime\Engine\Engine\ULevelStreaming) * InLevel, [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [ULevelStreaming](API\Runtime\Engine\Engine\ULevelStreaming) > LevelStreamingClass )